Combobox autocomplete

[jmcilhinney]

I don't really see how that's possible. I just created a new WinForms app and added a ComboBox to the form. I then changed the form's code file to this:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
 
namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
            List<Order> orders = new List<Order>();
 
            orders.Add(new Order(1, "alpha"));
            orders.Add(new Order(2, "november"));
            orders.Add(new Order(3, "tango"));
            orders.Add(new Order(4, "tangle"));
 
            this.bindingSource1.DataSource = orders;
            this.comboBox1.DataSource = this.bindingSource1;
        }
 
        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            Console.WriteLine((this.bindingSource1.Current as Order).Name);
        }
    }
 
    public class Order
    {
        private int _id;
        private string _name;
 
        public int ID
        {
            get { return _id; }
            set { _id = value; }
        }
 
        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }
 
        public Order(int id, string name)
        {
            this._id = id;
            this._name = name;
        }
    }
}

When I ran the project the Output window showed "alpha" as expected as the first item was selected. I then typed "t" and "a" and, as expected, there was no new output because entering characters into the box doesn't raise the SelectedIndexChanged event.

I suggest that you place a breakpoint on the first line of the event handler and then when it's hit take a look at the Call Stack window to see where it has come from. I just don't see how it could be caused merely by entering a letter in the box.